Title 67
§ 175.125. Lighting and electrical systems.
(a) Condition of lamps and switches. Every required lamp or switch shall be in safe operating condition as described in § 175.130 (relating to inspection procedure).
(b) Lighting standards. Lamps shall comply with Tables II—IV; Chapter 153; and 75 Pa.C.S. Chapter 43 (relating to lighting equipment).
© Other required lamps. A trailer shall have at least one red stop lamp on each side of the rear of the vehicle, which shall be illuminated immediately upon application of the service brake.
(d) Illumination. A trailer shall be equipped with parking lamps, stop lamps, tail lamps, turn signal lamps and hazard warning lamps designed for that specific function, which under normal atmospheric conditions, shall be capable of being seen and distinguished during nighttime operation, at a distance of 500 feet. See 75 Pa.C.S. § 4303(b)—(d) (relating to general lighting requirements).
(1) Stop lamps, turn signals and hazard warning lamps shall be visible at a distance of 100 feet during normal sunlight.
(2) Rear lamps shall be lighted whenever headlamps, fog lamps or auxiliary driving lamps are in operation.
(3) A trailer shall be equipped with hazard warning lamps, unless these lamps were not included as original equipment.
(4) The turn signals shall have a frequency of flash between 60—120 flashes per minute.
(e) Condition and position of lamps. Lamps shall be properly fastened; direct light properly; be of a color not contrary to regulations—see Tables II—IV (relating to required motor vehicle lighting equipment; location of required equipment; and required motor vehicle lighting equipment); and may not be so obstructed by a screen, bar, auxiliary equipment or device of any kind as to obscure, change color of or obstruct the beam.
(f) Ornamental lamps. A lamp not enumerated in this section, and not located as described in Tables III—V of this chapter is prohibited unless it is available as original equipment. An illuminated sign is prohibited. Flashing or revolving lights are not ornamental lamps. Provisions relating to flashing or revolving lights are located in Chapters 15 and 173 (relating to authorized vehicles and special operating privileges; and flashing or revolving lights on emergency and authorized vehicles).
(g) Back-up lamps. Back-up lamps, if the vehicle is so equipped, shall turn off automatically when the vehicle goes forward.
(h) Registration plate lamp. A registration plate lamp, if originally equipped, shall emit white light and make the registration plate visible from a distance of 50 feet to rear of the vehicle.
(i) Exception. A trailer that is less than 30 inches in overall width may be equipped with only one of each of the following lamps and reflective devices, located at or near its vertical centerline: tail lamps, stop lamp and rear reflex reflector.